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DELEGATION MONITORS CHECHNYA WAR

Russian forces bombarded the center of the Chechen capital of Grozny yesterday, despite the presence of a five-member delegation from the Organization for Security and Cooperation in Europe, which arrived yesterday to monitor conditions in the seven-week-long war. On Saturday, Interfax news agency reported Chechen leader Dzhokhar Dudayev as saying the war may spread to other Russian cities if the Kremlin did not start peace talks. President Dudayev's information minister sought to soften the impact of the warning without contradicting his leader's remarks, while a Russian government statement yesterday declared the threat ''incomprehensible.''

Gramm wins Arizona poll

Texas Sen. Phil Gramm won Arizona's first Republican presidential straw poll Saturday, although he did not achieve the lofty numbers he received three weeks earlier in Louisiana.

Mr. Gramm received 460 of the about 850 votes cast, well behind the 72 percent he scored in a similar contest Jan. 7 in Louisiana.

Baby Richard case

US Supreme Court Justice John Paul Stevens refused Saturday to block an Illinois Supreme Court ruling that gave custody of a boy known as ''Baby Richard'' to the biological father he has never met. Richard will stay with the adoptive family for now, a spokesman for the biological father said.

Agassi wins tennis title

A confident Andre Agassi defused the power of fellow American Pete Sampras yesterday and won the Australian Open men's singles title in Melbourne. It was Mr. Agassi's second successive Grand Slam title following his victory in the US Open late last year. Mary Pierce of France defeated Arantxa Sanchez Vicario of Spain on Saturday to win the women's singles final - her first Grand Slam title.

Killings in Burundi

US Ambassador to Burundi Robert Kruger said yesterday that at least 67 people, including a number of children, have been killed by armed men in a new outbreak of ethnic killing north of Bujumbura, the capital.